The laws and mechanics of circulation, with the principle involved in animal movement . apse in the walls and rude contactof opposing surfaces; otherwise inevitable. Hence, it is easyto perceive the enormous role residual air performs in respira-tion. And nothing is to be more admired than the compre-hensive arrangements that obtain in the lungs for producingsimultaneous currents of air and blood through the alveoli andmaintaining correspondence ; but a common law underlying itall enables this to be done. And by means of the cardiacforce-pump and the innumerable muscles in the vascular sys-tem
The laws and mechanics of circulation, with the principle involved in animal movement . apse in the walls and rude contactof opposing surfaces; otherwise inevitable. Hence, it is easyto perceive the enormous role residual air performs in respira-tion. And nothing is to be more admired than the compre-hensive arrangements that obtain in the lungs for producingsimultaneous currents of air and blood through the alveoli andmaintaining correspondence ; but a common law underlying itall enables this to be done. And by means of the cardiacforce-pump and the innumerable muscles in the vascular sys-tem inclusive of the nervous combinations in the medulla ob- PHYSIOLOGICAL ANATOMY. 125 longata for coordinating them with, respiration, inertia in theblood is overcome and correspondence readily produced be-tween the blood and air in the alveoli, while the pumpingmovements extend from centre to circumference of the bodyand from the lungs to every tissue territory, the whole beingintimately connected with respiration by means of the correla-tion of the nerves in the respiratory Fig. 38.—Bronchi and Lungs, Posterior View.—Sappey. 1,1, summit of the lungs ;2, 2, base of the lungs ; 3, trachea ; 4, right bronchus ; 5, division to the upper lobeof the lung ; 6, division to the lower lobe ; 7, left bronchus ; 8, division to the upperlobe ; 9, division to the lower lobe ; 10, left branch of the pulmonary artery ; 11,right branch ; 12, left auricle of the heart ; 13, left superior pulmonary vein ; 14,left inferior pulmonary vein ; 15, right superior pulmonary vein ; 16, right inferiorpulmonary vein ; 17, inferior vena cava ; 18, left ventricle of the heart; 19, rightventricle. In this manner, then, a dual circulation of air and blood isproduced through the lungs for respiratory purposes, the wasteproducts flowing out with the tidal air for redistribution, whilethe oxygenated blood passes into the left cardiac chamber andarterial system on its way to the cell-brood, as before
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Keywords: ., bookcentury1800, bookde, booksubjectblood, booksubjectrespiration
